This is also how I read it. I actually really appreciate attacking the idea of "white as default". It's kind of like how some gamers think representing anything besides the "default" demographic is "political".

I think this is the more revealing excerpt:

This is the defining irony of white film-making. The more oblivious your film is to matters of race, the whiter it plays. Because whiteness is often exactly that: the freedom not to see race, even when it’s right there in front of you.

Basically, being aware of whiteness makes for less racist movies. There's nothing wrong with white movies, but it's wrong when white movies pretend they're not white, but universal and default. The article concludes:

Instead, our twofold expectation should be this: 1) The industry affords more film-makers of colour the same creative freedoms and commercial opportunities that are now afforded white film-makers, and 2) That the film culture – including the film-makers themselves – develop the confidence, insight and language to discuss and dethrone white cinema.

This does not sound like racist dog-whistling or white supremacy to me.

Yep, and the top comment showed the exact kind of thinking that led to the creation of OPs meme.

Just talking about whiteness in anything other than accusatory or self-deprecating terms is always racism by default, even if the points made are absolutely valid and not racist at all.

This in turn leads to a situation where a large chunk of the "mildly conservative" folks can only assume, that if those are the advocates of the movement, then just mentioning their own identity will get them in trouble. Demagogues of course gladly take it from there.

Once again, self-righteous zealots sabotage the very thing they claim to be fighting for, by completely not understanding what that actually means.